Valve



VALVE R. G. MINER F'ilecl March 2l. 1935 Jan. 7, 1936.

INVENTO @M M BY ATTORNEY Plantea Jan. 1, 193s PATENT OFFICE VALVE RobertG. Miner, La Crosse, Wis., assignor to The Trane Commny, La Crosse,

Wis.

y Application March 2l, 1935, Serial No. 12,232

s (ci. 251-139) My invention relates to a packless valve.

One of the objects of my invention` is the use of a diaphragm for thepurpose of seating thevalve and preventing the escape of steam or gastherefrom.

Another object of my invention is totransmit motion through thediaphragm and to multiply the motion thereof on the side of thediaphragm nearest the valve, thereby preventing abnormal distortion ofthe diaphragm.

The various features of novelty which characterize my invention arepointed out in claims annexed to and formingda partof ,thisspecification. y

In the accompanying drawing which illustrates my invention, Figure 1isasectional'elevatlonof the valve open.

Figure '2 is a sectional elevation of the valve lin a closed position.

In both views the dotted line 39 represents a portion of the valve stemcut away.

Referring to l, I is a bonnet interiorly threaded at 2 and with ashoulder 3` toptop the upward progress of the stem 4, which isexteriorly threaded to nt into the thread! and has a shoulder 5 adaptedto strike against theshoulder 2. The top of the stem l has abeveledportion l adapted to` fit a handle, Vnot shown. The base of thestem I comprises an integral crowned disc I so adapted that upon adownward movement of the stem, the crowned disc 1 will press upon thecorrugated exible diaphragm l, which has an annular corrugation 9. Theedge Il of the disc is' adapted to fit between the annular shoulder I Iof the bonnet I and the upper annular face I2 of the valve body I3. Thebonnet I isV -interiorly threaded at 'I4 and is mounted on the valvebody by threading it' on the exterior thread i5 oi the valve body I2.'The corrugated disc, whenthus fixed between then-valve, body and thebonnet, seals the top of the valve and-prevents the escape of steam orgas therefrom.

'I'he fulcrum plate I2 is an annular disc slightly crowned at I1, with-a lower concaveV portion I8 and with an annular fiat surface- I9resting 'upon the upper faces of fulcrum Vlevers120 which lie withoutaillxation in the radial slots 2i of the valve stem 22. A portion ofthevalve stem is cut away forming an annular channelsection 24, one sideof which is an integral annular flange 2li and the other side of saidchannel section is a cylindrical rod 25 interiorly threaded at the baseat 26, by which is guide 28 comprises the cylindrical wall 29. a natrlilleralf edge attached the valve head 2T which is threaded into thevalvestemat 2. The' base 30 -with a round aperture II. through which therod 25 passes and is guided thereby. The upper end of the cylindricalwall is ared out in an integral upwardly flared flange 32, the pe- 23 ofwhich is supported on r'the 5 annular `shoulder 3l of the valve body.

'l'he flange 22 is flared to allow movement of the iulcrum levers 20, asshown in Figure 2. A coiled spring 25 wound around the rod 25 has oneend positioned against the guide 28 and its other l0 end positionedagainst the bottom of the channel section 2l. The guide is stationaryand as the stem 22' moves down to close the valve, the spring iscompressed and will .tend to open the valve when the downward pressureon the valve stem 15 is released.

The valve body .containsthe ports 36 and 31 and the ordinary valve seat38.

` Figure 2 shows a section of the valve when it isclosed and the springcompressed, and shows the 20 action of the fulcrum levers 20 with aportion oi the stem cut away on the dotted lines 39.

Each fulcrum lever has three points of contact, one 4Q', its top, whereit contacts the lower surface o! the iulcrumplate at I9, a second point25 of contact at 4I. where it contacts the stationary upper face of theange 22, a third point of contact at 42, where vit contacts the movablevalve stem 22 at the bottom of the slot 2| at the point shown in Figure2 as at 43. It is seen that by 30 movement of the lever at the point lllthe movement of the lever at the point 43 will be accord-A ing to thelaw of levers. v

f Although the levers 2li are not positively anchored, it can be saidthat the point. of'pivot35 'is at 44I and the free end. at l2 and thetorce apthe stem 2 imparts motionito the fulcrum plate through thecorrugated diaphragm, and the movtion imparted to the fulcrum plate ismultiplied by the lever action described before and again imparted tothe valve lstem 22, which operates to Sorce the valve head upon theseat. Upon the movement upward of the stem 2. the pressure upon'ftheIulcrum plate `is released and the valve then operates to open by meansof the torce exerted by the coil spring 25.

It will be further seen that the fulcrum levers 2l which lie withoutaiilxation in the radial slots 50 2i in the head of the valve stem 22are maintained in their respective posltionbetween slots 39! Althoughone lspelen-lc embodiment of the invention has been particularly shownand scribed, it will be understood that the invention is capable ofmodification and that changes in the constructionand in the arrangementof the va rious co-operating parts may be made without departing fromthe spirit or scope of the invention, as expressed in the followingclaims.

What I claim is:

1. In a valve, a body having ports, a valve seat, a valve member havinga seat contacting portion at one end, valve actuating means extendingexteriorly of the valve body and movable in the direction vof movementof said valve member for applying force thereto and adjusting itrelative to its seat, a lever within said valve body iulcrumed at-oneend thereon and bearing at its other end on said valve member, a nexiblediaphragm positioned between said means and said lever, and meansengaging the lever intermediate its ends to transmit the force soapplied to the valve member and to multiply the motion thereof.

2. In a valve, a body having ports, a valve seat, a valve member havinga seat contacting portion at one end, manual operating means havingmovement in the line of travel of said valve member for adjustingit'relative to its seat, a exible disc through which motion istransmitted from said operating means, a lever within said bodyiulcrumed at one end thereon and bearing at its other end on said valvemember, said manual operating means applying force through said flexibledisc to said lever intermediate its ends, thereby to multiply the motionof the valve member relative to the operating means.

3. In a valve, a body having ports, a valve seat,

' a valve member having a seat contacting portion l at one end, valveactuating means movable in the direction oi travel of said valvememberto seat the same, a ilexible disc through which motion is transmittedfrom said operating means, a spring in contact with said valve memberfor unseating it when said valve actuating means is withdrawn, a leverwithin said valve body fulcrumed at one end thereon and bearing at itsother end on said Y valve member, said valve actuating means applyingforce through said iiexible disc to said lever intermediate its ends,thereby to multiply the motion of the valve member relative to theoperating means.

4, In a packless valve, a valve body with ports therein, a valve seat, avalve head closing said valve seat, a valve stem attached to said valvehead, va' ilexible disc sealing the top of said valve body, meansoutside said Body to impart motion to said disc, a fulcrum plate incontact with said to said valve head by means of said independent disc,independent levers-with their upper faces in contact with said fulcrumplatey intermediate their ends, one end of each such independentleversbeing supported by the valve body and the v other end of each inoperative contact with said valve stem, whereby such motion is receivedby said fulcrum plate and retransmitted multiplied levers.

' threin,

'5. In a packless valve, a valve body with ports head, a ilexible discsealing the top of said valve body, means outside said body to impartmotion 5 to said disc, a fulcrum plate in contact with said .disc, slotsin said valve stem, and levers in contact with said fulcrum plateintermediate theirl ends and with one end of each supported by the valvebody and the other end bearing upon the bottom wall of said slots,whereby motion is received by said' fulcrum plate and re-transmittedmultiplied to said valve head by means of said levers. 6. In a packlessvalve, a valve body with ports therein, a valve seat, a valve headclosing said valve seat, a valve stem attached to said valve head, avflexible disc sealing the top of said valve body, means outside saidbody to impart motion and pressure to said disc, a iulcrum plate incontact with said disc, slots in said valve stem, radially disposedlevers in contact with the -lower face of said fulcrum plateintermediate their ends and supported respectively at their ends by theValve body and in operative contact with the bottom wall of said slots,whereby motion is received plied to said valve head by means of saidradially disposed levers.

7. In a packless valve, a valve body with ports a valve seat, a valvehead closing said valve seat, a valve stem attached to said valve head,a ilexible disc sealing the top of said valve body, means outside saidbody for imparting motion and pressure to said disc', and means within1^said body to mulitply and impart such motion to said valve head, saidlast-named means compris-A ing a fulcrum plate having a convex upperface, and ynattached levers, the upper convex -face of said fulcrumplate being in contact with saiddisc and the lowe'r face thereof incontact with said 40 unattached leversintermediate their ends, 'therespective ends of said unattached levers being in operative contactwith said uvalve stem and fulcrumed upon a ilxed support within saidvalve body.

valve seat, a" valve stem attached to sai valve head, a exible discsealing the top of said alve 50 said valve stem.

' ROBERT G. MINER.

45 8. In a packless valve, a valve body ywith ports therein, a valveseat, av valve headclosing said havinga convex upper face and ga 55

